Telephone-receiver.



"W. W. DEAN.

TELEPHCNE RECEIVER.

AIPLIGATIOH FILE!) MABJ, 191").

Patented July 19,1910.

v lav fl i" WilliAm WDeAn.

9 J0 mg UNITED STATES PATENT OFFICE.

WILLIAM XV. DEAN, OF ELYRIA. OHIO, ASY-IGNOR TO THE DEAN ELECTRIC COMPANY,

' OF ELYRIA, OHIO. A CORPORATION OF OHIO.

TELEPHONERECEI (ER.

Specification of Letters Patent.

Patented July 19, 1910.

Application filed March 7. 1910. Serial No. 547.90?

To (1/! whom it may concern:

lle it known that 1 llnmmn W. Dean, :1 v

this insulating member htting within and held by the same. The ear cap is then fascitizen of the United States. re iding at Elyria. in the county of Lorain and State of Ohio. have inrentcd certain new and useful Improvemcnls in 'l'clcphon -lleti-civers; and .1 do hereby declare the following to be a full. clear, and exa t description of the invention, such as will enable others skilled in the art to which it appcrtains to incnt thercol, while 1ts scope will be more make and use the same.

My invention relates to telephone rcceivi crs used in connection with subscribers telephone sets.

)roduccd such an instrument incased in a metallic shell in such a way that it is tirmly held therein. llithe'rto most rec iver shells hare been constructed of hard rubber or some composition. 'lhese shells have coir veuicnt to drive 'Ll'(".\':-. or other means for lash-lung the re eiver into the shell.

More particularly, l have 1 abutment I place an annular insulating member. The receiver cup is placed within (cued on the shell clamping tie cup down againstlhe abutment.

My invention will be best unde "stood by reference to the tolhnving description when taken in connection with the. accompanying illustration showing one specific embodian abutment upon the interim-"oi the shell.

'sitlerablc body to them into which it is con- E 'l'hc metal is then bcnl over at (3 lormin an annular ridge on lllt' outside and an annular other method of fastening and holdiu g the receiver in the shell consists in clamping the I edge of the cup and the diaphragm between the edge of the shell and the. ear cap. This method is impractical where a metallic shell is used, because of the coiuluciivity ol the. latter. if insulation heavy enough to guard against grounding the mclallic shell and subjecting the user to a shock were used, the combined insulation. diaphragm and cup edge would be too butler to be conveniently clamped between said parts. in other rccclvers the heavy shell has been cut away to form a shoulder below the edge of the shell and the edge of the cup clamped between this shoulder and other parts. This obviously is likewise impracticable where a As none of these,-

luclallic shell is used. methods is aratlablc for metallic shells, un less some convenient means for scruring the receiver within the shell could be. devised, i the use of a metallic shell wouldbc impractical. Owing to the large losses due. to

breakage of rubber and composition shells x t l l I I l l l and the still more expensive irip to renew the same, a shell as highly ii'nlc trucliblcf l have prof vitled a sheet metal shell which is folded ground the shell.

as a metal shell is desirable.

orer near one end to form an allotment. Beyond this fold the shell is bent back again to form an annular ring, then extended about to its edge parallel to its general direction. \Vithin the shell against; the

t l l i l l l groove 14 on the interior; the shell then extends. to its end. in the general direction thereof. A thrcadcd rin; T is fastened upon the cud of the shell. A c vlindcr of insulating material 2- is placed in the inside of the shell. The receiver cup or support l carrying a receiver phu-cd'n'ithin' llushel part 2) projects from the (tlfL'l oi the cup and when the same is within the shell. engages tlu' abutment 5 to determine the pl rllitlll of aid cup therein. .m l!|.--lt= latiuc annular member 10 is placed against the abutment to insulate the. rccciz'cr cup therefrom. The edge thereof is jammed up in the groove. This member may be heavy and strong enough to perform some of the functions of the abutment.

tration. The receiver diaphragm is shown at 11. A threaded ring clamps this diaphragm against the cup. An insulating dish 12 is placed upon the threaded ring 12 and the ear cap --crewe l upon the shell. The cap clamps the. edge of the support between itself and the abutment. holding the receiver support sccurcly within the shell. in thev l'orm shown the. cup does not engage the shell or its parts except at the clamping parts. thus making it almost. impossible to Obviously I may use any form of support for my receiver and m'ay clamp any part: cf it convenient for that purpose between in: abutment and the cap. When the cap 2 This is true in the form of my invention shown in the illusfastened upon the shell, the insulating disk 13 is clamped between the ring 12 and the iVhile I have shown my invention in this particular form it will be obvious to'those skilled in the art that numerous and extensive departures from theform a d details of the apparatus here shown may be made without departing from the spirit of this invention, the same being herein shown solely for the purpose of clearly illustrating one specific embodiment thereof.

I claim:

-1. In a telephone receiver, a metallic receiver shell made of thin sheet metal having an open end, the walls of said shell being 3 folded over near said open end to form an abutment, a receiver cap adapted to be connected to said shell, a receiver supiort adapted to be clamped between said :1 ntment and said cap to hold it in position in said shell, and a receiver supported by said support.

2. In a telephone receiver, a metallic re ceiver shell made of thin sheet metal having an open end, the walls of said shell being folded over near said open end to form an abutment, a receiver cap adapted to be connected to said shell, a receiver support, an annular flange thereon, said support adapted to be positioned in said shell by clamping the flange between said cap and said abutment.

3. In a telephone receiver, a metallic receiver shell made of thin sheet metal having an open end, the walls of said shell being folded over near said open end to form an abutment, a receiver cap adapted to be connected to said shell,- a receiver support adapted to be clamped between said abutment and said cap to hold it. in position in said shell, and means to insulate said support from said shell interposed between the clamping surfaces.

4. In a telephone receiver, the combination of a shell made of thin sheet metal, said shell folded over near one end to form an abutment, an annular ring resting against said abutment and serving as an insulator,

a receiver support, a part of said support resting against said annular ring and a receiver cap adapted to be attached to said shell.

6. In a telephone receiver, the combination of a shell made of thin sheet metal folded over near one end to form a groove, an annular ring mounted in said groove, a receiver support having an annular flange thereon, and a receiver cap adapted to clamp said flange against said ring to hold said support securely in said shell and a receiver carried by said support.

7. In a telephone receiver, the combination with a metallic shell having an open end, said shell being folded over near one end to form an abutment, a receiver support, means on said support for engaging said abutment, means for clamping said engaging means against said abutment to retain said receiver support in place in said shell, and means for insulating said support from said shell.

In testimony whereof I aflix my signature in presence of two Witnesses.

WILLIAM \V. DEAN. lVitnesscs C. A. Sevens-00L, F. O. Ricm-zr. 

